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Append the terminating null character at the end of the string to avoid buffer overflow.

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Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qiu Shumin <shumin.qiu@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15888 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Qiu Shumin
2014-08-25 08:04:52 +00:00
committed by shenshushi
parent b69fd59e6f
commit a361d39160
4 changed files with 13 additions and 4 deletions
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6
MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcMtftp.c
View File

@@ -60,7 +60,8 @@ PxeBcCheckPacket (
if (Packet->OpCode == EFI_MTFTP4_OPCODE_ERROR) {
Private->Mode.TftpErrorReceived = TRUE;
Private->Mode.TftpError.ErrorCode = (UINT8) Packet->Error.ErrorCode;
AsciiStrnCpy (Private->Mode.TftpError.ErrorString, (CHAR8 *) Packet->Error.ErrorMessage, 127);
AsciiStrnCpy (Private->Mode.TftpError.ErrorString, (CHAR8 *) Packet->Error.ErrorMessage, PXE_MTFTP_ERROR_STRING_LENGTH);
Private->Mode.TftpError.ErrorString[PXE_MTFTP_ERROR_STRING_LENGTH - 1] = '\0';
}
if (Callback != NULL) {
@@ -162,8 +163,9 @@ PxeBcTftpGetFileSize (
AsciiStrnCpy (
Private->Mode.TftpError.ErrorString,
(CHAR8 *) Packet->Error.ErrorMessage,
127
PXE_MTFTP_ERROR_STRING_LENGTH
);
Private->Mode.TftpError.ErrorString[PXE_MTFTP_ERROR_STRING_LENGTH - 1] = '\0';
}
goto ON_ERROR;
}

4
MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcMtftp.h
View File

@@ -1,7 +1,7 @@
/** @file
Mtftp routines for PxeBc.
Copyright (c) 2007 - 2009, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -21,6 +21,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define PXE_MTFTP_OPTION_MULTICAST_INDEX 3
#define PXE_MTFTP_OPTION_MAXIMUM_INDEX 4
#define PXE_MTFTP_ERROR_STRING_LENGTH 127
/**
This function is to get size of a file by Tftp.